Add mirror ratio objective

[f0uriest]

Resolves #848

Likely needs #1225 for it to work correctly for OmnigenousField

[codecov]

Codecov Report

Attention: Patch coverage is 94.59459% with 2 lines in your changes missing coverage. Please review.

Project coverage is 95.50%. Comparing base (51d637c) to head (e78eaf2).
Report is 50 commits behind head on master.

Files with missing lines	Patch %	Lines
desc/objectives/_geometry.py	94.59%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1366      +/-   ##
==========================================
- Coverage   95.50%   95.50%   -0.01%     
==========================================
  Files          96       96              
  Lines       24028    24065      +37     
==========================================
+ Hits        22948    22983      +35     
- Misses       1080     1082       +2     

Files with missing lines	Coverage Δ
desc/compute/_field.py	100.00% <ø> (ø)
desc/objectives/__init__.py	100.00% <ø> (ø)
desc/objectives/_geometry.py	96.79% <94.59%> (-0.23%)	⬇️

... and 2 files with indirect coverage changes

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[github-actions]

|             benchmark_name             |         dt(%)          |         dt(s)          |        t_new(s)        |        t_old(s)        | 
| -------------------------------------- | ---------------------- | ---------------------- | ---------------------- | ---------------------- |
 test_build_transform_fft_midres         |     -3.79 +/- 5.12     | -2.45e-02 +/- 3.30e-02 |  6.20e-01 +/- 2.6e-02  |  6.45e-01 +/- 2.0e-02  |
 test_build_transform_fft_highres        |     -2.14 +/- 3.27     | -2.15e-02 +/- 3.30e-02 |  9.86e-01 +/- 2.5e-02  |  1.01e+00 +/- 2.2e-02  |
 test_equilibrium_init_lowres            |     -5.35 +/- 5.00     | -2.25e-01 +/- 2.10e-01 |  3.98e+00 +/- 2.0e-01  |  4.20e+00 +/- 6.8e-02  |
 test_objective_compile_atf              |     +0.58 +/- 3.82     | +4.61e-02 +/- 3.06e-01 |  8.07e+00 +/- 1.7e-01  |  8.02e+00 +/- 2.6e-01  |
 test_objective_compute_atf              |     -2.34 +/- 5.04     | -2.52e-04 +/- 5.43e-04 |  1.05e-02 +/- 2.6e-04  |  1.08e-02 +/- 4.8e-04  |
 test_objective_jac_atf                  |     +0.95 +/- 2.38     | +1.86e-02 +/- 4.65e-02 |  1.97e+00 +/- 2.8e-02  |  1.95e+00 +/- 3.7e-02  |
 test_perturb_1                          |     -1.02 +/- 3.18     | -1.50e-01 +/- 4.65e-01 |  1.45e+01 +/- 4.3e-01  |  1.47e+01 +/- 1.8e-01  |
 test_proximal_jac_atf                   |     +0.09 +/- 0.93     | +7.11e-03 +/- 7.68e-02 |  8.23e+00 +/- 3.3e-02  |  8.23e+00 +/- 6.9e-02  |
 test_proximal_freeb_compute             |     +0.17 +/- 1.10     | +3.43e-04 +/- 2.18e-03 |  1.99e-01 +/- 1.6e-03  |  1.98e-01 +/- 1.5e-03  |
 test_build_transform_fft_lowres         |     +1.52 +/- 7.46     | +8.00e-03 +/- 3.93e-02 |  5.35e-01 +/- 3.3e-02  |  5.27e-01 +/- 2.1e-02  |
 test_equilibrium_init_medres            |     -0.14 +/- 2.48     | -5.78e-03 +/- 1.03e-01 |  4.14e+00 +/- 6.1e-02  |  4.15e+00 +/- 8.3e-02  |
 test_equilibrium_init_highres           |     +0.33 +/- 1.59     | +1.81e-02 +/- 8.64e-02 |  5.44e+00 +/- 7.1e-02  |  5.43e+00 +/- 4.9e-02  |
 test_objective_compile_dshape_current   |     -0.64 +/- 1.14     | -2.50e-02 +/- 4.44e-02 |  3.86e+00 +/- 4.1e-02  |  3.88e+00 +/- 1.7e-02  |
 test_objective_compute_dshape_current   |     +0.45 +/- 1.70     | +1.62e-05 +/- 6.12e-05 |  3.62e-03 +/- 2.7e-05  |  3.60e-03 +/- 5.5e-05  |
 test_objective_jac_dshape_current       |     -2.78 +/- 7.12     | -1.14e-03 +/- 2.91e-03 |  3.97e-02 +/- 1.2e-03  |  4.09e-02 +/- 2.6e-03  |
 test_perturb_2                          |     -0.51 +/- 1.65     | -9.77e-02 +/- 3.13e-01 |  1.89e+01 +/- 2.3e-01  |  1.90e+01 +/- 2.1e-01  |
 test_proximal_freeb_jac                 |     +0.91 +/- 1.23     | +6.76e-02 +/- 9.14e-02 |  7.51e+00 +/- 7.2e-02  |  7.44e+00 +/- 5.7e-02  |
 test_solve_fixed_iter                   |     +1.28 +/- 60.15    | +6.51e-02 +/- 3.05e+00 |  5.14e+00 +/- 2.2e+00  |  5.07e+00 +/- 2.2e+00  |